130 lines
5.1 KiB
Python
130 lines
5.1 KiB
Python
#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2014-2016 Wojtek Porczyk <woju@invisiblethingslab.com>
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# Copyright (C) 2016 Marek Marczykowski <marmarek@invisiblethingslab.com>)
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# Copyright (C) 2016 Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, see <https://www.gnu.org/licenses/>.
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#
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''' This module contains the AppVM implementation '''
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import copy
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import qubes.events
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import qubes.vm.qubesvm
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import qubes.vm.mix.dvmtemplate
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from qubes.config import defaults
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class AppVM(qubes.vm.mix.dvmtemplate.DVMTemplateMixin,
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qubes.vm.qubesvm.QubesVM):
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'''Application VM'''
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template = qubes.VMProperty('template',
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load_stage=4,
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vmclass=qubes.vm.templatevm.TemplateVM,
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doc='Template, on which this AppVM is based.')
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default_volume_config = {
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'root': {
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'name': 'root',
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'snap_on_start': True,
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'save_on_stop': False,
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'rw': True,
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'source': None,
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},
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'private': {
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'name': 'private',
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'snap_on_start': False,
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'save_on_stop': True,
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'rw': True,
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'size': defaults['private_img_size'],
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},
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'volatile': {
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'name': 'volatile',
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'snap_on_start': False,
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'save_on_stop': False,
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'size': defaults['root_img_size'],
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'rw': True,
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},
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'kernel': {
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'name': 'kernel',
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'snap_on_start': False,
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'save_on_stop': False,
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'rw': False,
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}
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}
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def __init__(self, app, xml, **kwargs):
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# migrate renamed properties
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if xml is not None:
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node_dispvm_allowed = xml.find(
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'./properties/property[@name=\'dispvm_allowed\']')
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if node_dispvm_allowed is not None:
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kwargs['template_for_dispvms'] = \
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qubes.property.bool(None, None, node_dispvm_allowed.text)
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node_dispvm_allowed.getparent().remove(node_dispvm_allowed)
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self.volume_config = copy.deepcopy(self.default_volume_config)
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template = kwargs.get('template', None)
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if template is not None:
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# template is only passed if the AppVM is created, in other cases we
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# don't need to patch the volume_config because the config is
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# coming from XML, already as we need it
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for name, config in template.volume_config.items():
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# in case the template vm has more volumes add them to own
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# config
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if name not in self.volume_config:
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self.volume_config[name] = config.copy()
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if 'vid' in self.volume_config[name]:
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del self.volume_config[name]['vid']
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super().__init__(app, xml, **kwargs)
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@qubes.events.handler('domain-load')
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def on_domain_loaded(self, event):
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''' When domain is loaded assert that this vm has a template.
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''' # pylint: disable=unused-argument
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assert self.template
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@qubes.events.handler('property-pre-reset:template')
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def on_property_pre_reset_template(self, event, name, oldvalue=None):
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'''Forbid deleting template of running VM
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''' # pylint: disable=unused-argument,no-self-use
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raise qubes.exc.QubesValueError('Cannot unset template')
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@qubes.events.handler('property-pre-set:template')
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def on_property_pre_set_template(self, event, name, newvalue,
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oldvalue=None):
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'''Forbid changing template of running VM
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''' # pylint: disable=unused-argument
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if not self.is_halted():
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raise qubes.exc.QubesVMNotHaltedError(self,
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'Cannot change template while qube is running')
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@qubes.events.handler('property-set:template')
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def on_property_set_template(self, event, name, newvalue, oldvalue=None):
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''' Adjust root (and possibly other snap_on_start=True) volume
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on template change.
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''' # pylint: disable=unused-argument
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for volume_name, conf in self.default_volume_config.items():
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if conf.get('snap_on_start', False) and \
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conf.get('source', None) is None:
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config = conf.copy()
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self.volume_config[volume_name] = config
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self.storage.init_volume(volume_name, config)
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